You are stirred awake in the middle of the night by a couple screaming/ fighting outside your window. You peek out of your blinds and it's a young couple (early twenties maybe) and you see him raise his hands to her as if to scare her and then grab her and start shoving her forcefully down the sidewalk several yards until finally shoving her down in a grassy area where she starts to cry and he continues to yell at/ over her.
What do you do?
ETA: Everyone is saying call the cops. But the cops take 10 minutes to get there and by that time, the couple is nowhere to be seen. :/